Mitsubishi Evolution X. Manual - part 1293

HEATER UNIT AND BLOWER ASSEMBLY

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55-123

DISASSEMBLY AND REASSEMBLY

M1552020900348

AC608203

1

AB

2

3

4

5

6

7

8

9

10

11

12

27

27

30

29

28

13

14

16

17

N

15

18

19

20

21

22

23

25

24

26

31

32

33

Disassembly steps 

1.

KOS-ECU

2.

Rear center duct

3.

Front center duct

4.

Foot duct

5.

A/C-ECU

6.

Air mixing damper control motor

7.

Mode selection damper control 
motor

8.

Mode lever

9.

Outside/Inside air selection damper 
control motor 

10. Heater core cover
11. Heater core
12. Expansion valve cover

13. Upper case assembly
14. Evaporator
15. Air thermo sensor
16. Expansion valve
17. O-ring
18. Air filter cover
19. Air filter
20. Power transistor
21. Blower motor
22. Insulator
23. Air intake duct
24. Blower case upper
25. Outside/inside air selection damper
26. Blower case lower

Disassembly steps (Continued)

HEATER UNIT AND BLOWER ASSEMBLY

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55-124

INSPECTION

M1554011900313

.

AIR THERMO SENSOR CHECK

Measure the resistance between the sensor terminals under at 
least two temperatures. The resistance values should meet the 
values shown.
NOTE: The temperature should be within the shown range.

27. Upper case
28. Mode selection damper (FOOT)
29. Mode selection damper (DEF)
30. Air mixing damper
31. Wiring harness
32. Aspirator
33. Lower case

Disassembly steps (Continued)

AC609399

25

20

15

10

5

0

AB

10
(50)

30
(86)

Resistance

(k

Ω)

Temperature ºC (ºF)

  0
(32)

  40
(104)

-10
(14)

 20
(68)

MOTORS AND TRANSISTOR

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55-125

MOTORS AND TRANSISTOR

REMOVAL AND INSTALLATION

M1551006900095

AC708788AC

1

2

3

4

5

6

7

8

Power transistor removal steps 

•

Bottom cover (passenger side) 
(Refer to GROUP 52A 

− Glove box 

P.52A-6

).

1.

Power transistor
Blower motor removal steps 

•

Bottom cover (passenger side) 
(Refer to GROUP 52A 

− Glove box 

P.52A-6

).

2.

Hose

3.

Blower motor

Air mixing damper control motor, 
mode selection damper control 
motor and outside/inside air 
selection damper control motor 
removal steps 

•

Rear heater duct A (Refer to 

P.55-138

).

•

A/C-ECU (Refer to 

P.55-129

).

<<

A

>>

4.

Air mixing damper control motor

<<

A

>>

5.

Mode selection damper control 
motor

6.

Clean air filter cover

7.

Clean air filter

<<

A

>>

>>

A

<<

8.

Outside/inside air selection damper 
control motor

MOTORS AND TRANSISTOR

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55-126

REMOVAL SERVICE POINT

.

<<A>> AIR MIXING DAMPER CONTROL MOTOR, 
OUTSIDE/INSIDE AIR SELECTION DAMPER 
MOTOR, MODE SELECTION DAMPER CONTROL 
MOTOR REMOVAL

NOTE: A normal plate-type ratchet driver is recommended.

INSTALLATION SERVICE POINT

.

>>A<< OUTSIDE/INSIDE AIR SELECTION 
DAMPER MOTOR INSTALLATION

From the hole where the clean air filter and blower motor are 
removed, support the outside/inside air selection damper from 
beneath, and then perform the alignment.

INSPECTION

M1551006300758

BLOWER MOTOR CHECK

Check that the motor turns when applying battery power 
between the connector terminals. Also check to see that there 
is no abnormal sound emitted from the motor at this time..

AC100628 AB

AC611918

AC